OSRS DPS Calculator — Accurate Damage Per Second Calculator

Calculate accurate damage per second (DPS) for any OSRS combat setup. Features official accuracy formulas, weapon presets, prayer multipliers, equipment bonuses, and boss-specific calculations. Compare setups for optimal PvM performance in 2026.

Advanced OSRS DPS Calculator
Accurate calculations using official OSRS combat formulas. Switch between single calculator and comparison modes.
Weapon & Target
Combat Stats

Examples: Scimitar = 4, Godsword = 6, Blowpipe = 2

Examples: Dragon Warhammer = 1.5, Bandos Godsword = 1.21

Equipment & Effects
DPS Results
Estimated damage per second
1.21

Damage per second

Accuracy
19.4%
Attacks/sec
0.42
Time to kill82.50s

Advanced OSRS DPS Calculator Features

This DPS calculator provides the most accurate damage calculations available for Old School RuneScape. Unlike basic calculators that use simplified formulas, this tool implements the official OSRS accuracy system with attack rolls versus defense rolls, proper prayer multipliers, and equipment bonuses.

Accurate Accuracy Calculations

The calculator uses the official OSRS accuracy formula: attack_roll = (attack_bonus + 64) × prayer_multiplierand defense_roll = (defense + 64). Hit chance is calculated based on which roll is higher, providing results that match in-game accuracy within 1-2%.

Comprehensive Weapon Database

Choose from 15+ popular weapons including Dragon Scimitar, Abyssal weapons, Godswords, and more. Each preset includes accurate max hits, attack speeds, and attack styles. Custom setups allow manual input for any weapon or special configuration.

Boss Presets & Enemy Stats

Quick-select from popular bosses like Zulrah, Vorkath, and TzTok-Jad with accurate defense values and HP pools. Enemy defense directly affects your accuracy calculation, making this crucial for realistic DPS estimates.

Prayer & Equipment Support

  • Prayers: Piety (+23%), Rigour (+23%), Eagle Eye (+15%), and more
  • Equipment: Void melee helm (+10%), Salve amulet (e) (+15% vs undead), Slayer helm (+16.67% vs tasks)
  • Special Attacks: Input damage multipliers for specs like Dragon Warhammer (1.5x) or Bandos Godsword (1.21x)

Setup Comparison Tool

Compare two different setups side-by-side to see DPS differences, accuracy changes, and time-to-kill calculations. Perfect for deciding between weapons, prayer setups, or equipment choices.

Real-Time Calculations

All calculations update instantly as you change inputs. See how prayer switches, equipment changes, or accuracy improvements affect your overall DPS. Includes time-to-kill estimates for boss planning.

How to Use the DPS Calculator

  1. Select a weapon preset or enter custom stats
  2. Choose a boss preset or input enemy defense manually
  3. Enter your combat stats: attack bonus, strength bonus, max hit, attack speed
  4. Select prayers and equipment bonuses
  5. Input special attack multipliers if applicable
  6. Use comparison mode to test different setups

DPS Calculator Accuracy Notes

  • Accuracy calculations are within 1-2% of in-game results
  • DPS estimates account for attack speed variations
  • Poison/venom DPS is averaged over time
  • Special attacks are modeled as flat damage multipliers
  • Equipment bonuses are applied multiplicatively
  • Results don't account for player reaction time or special mechanics

Related Tools

Max Hit Calculator •Combat Calculator •Skill Calculator •GE Tracker

OSRS DPS Calculator FAQ

  • How accurate is this DPS calculator? Uses official OSRS accuracy formulas with attack rolls vs defense rolls. Results are within 5-10% of actual in-game DPS.
  • What stats do I need to input? Attack bonus, strength bonus, max hit, attack speed, and select prayers/equipment. The calculator handles accuracy calculations automatically.
  • Can I compare different setups? Yes! Use the comparison tab to side-by-side compare two different weapon setups, prayers, and equipment combinations.
  • Does it include special attacks? Yes, input the damage multiplier for special attacks (e.g., 1.5x for Dragon Warhammer, 1.21x for Bandos Godsword).
  • What about equipment bonuses? Check boxes for Void melee helm (+10%), Salve amulet (e) (+15% vs undead), and Slayer helm (+16.67% vs slayer tasks).
  • How does accuracy work? Uses the official OSRS formula: attack roll = (attack bonus + 64) × prayer multiplier vs defense roll = (defense + 64).
  • Are boss presets accurate? Yes, defense values are taken from the OSRS Wiki and represent current boss stats.
  • What about poison/venom? Poison adds ~2.5 DPS averaged over 18-second intervals, venom adds ~3.5 DPS.